🧹 chore: Upgrade us to Dagger v0.20.6

[jpmcb]

Related to recent changes in our Daggerverse modules that use v0.20.6

[greptile-apps]

Greptile Summary

This PR upgrades the Dagger CI/CD tooling version from 0.20.1 to 0.20.6 across all GitHub Actions workflows, and updates the flake.lock with new Nix flake dependency hashes (for dagger/nix, nixpkgs, and papercomputeco/skills).

• All five workflow files (ci.yaml, cut-release.yaml, nightly.yaml, pr.yaml, release.yaml) have their DAGGER_VERSION env var bumped consistently from \"0.20.1\" to \"0.20.6\"
• flake.lock is refreshed with updated lastModified, narHash, and rev values for all three locked dependencies
• No logic or behavioral changes — purely a dependency version upgrade

Confidence Score: 5/5

Safe to merge — purely a version bump with no logic or behavioral changes

All six files have only mechanical version bump changes: the five workflow files update a single env var from 0.20.1 to 0.20.6 consistently, and flake.lock has matching new hashes. No logic, permissions, or control flow is altered. No issues found.

No files require special attention

Important Files Changed

Filename	Overview
.github/workflows/ci.yaml	DAGGER_VERSION bumped from 0.20.1 to 0.20.6 — no other changes
.github/workflows/cut-release.yaml	DAGGER_VERSION bumped from 0.20.1 to 0.20.6 — no other changes
.github/workflows/nightly.yaml	DAGGER_VERSION bumped from 0.20.1 to 0.20.6 — no other changes
.github/workflows/pr.yaml	DAGGER_VERSION bumped from 0.20.1 to 0.20.6 — no other changes
.github/workflows/release.yaml	DAGGER_VERSION bumped from 0.20.1 to 0.20.6 — no other changes
flake.lock	Nix flake lock updated: new revisions and hashes for dagger/nix, nixpkgs, and papercomputeco/skills

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    GHA[GitHub Actions Trigger] --> WF{Workflow}
    WF --> ci[ci.yaml]
    WF --> pr[pr.yaml]
    WF --> nightly[nightly.yaml]
    WF --> release[release.yaml]
    WF --> cutRelease[cut-release.yaml]

    ci --> DV["DAGGER_VERSION=0.20.6"]
    pr --> DV
    nightly --> DV
    release --> DV
    cutRelease --> DV

    DV --> Dagger[Dagger Engine v0.20.6]

    Nix[Nix Flake] --> flakeLock[flake.lock]
    flakeLock --> daggerNix["dagger/nix @ 851584f"]
    flakeLock --> nixpkgs["nixpkgs @ b86751b"]
    flakeLock --> skills["papercomputeco/skills @ e2428bb"]

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_{Reviews (1): Last reviewed commit: "🧹 chore: Upgrade us to Dagger v0.20.6" | Re-trigger Greptile}